This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A025690 #7 Jul 06 2025 14:22:47 %S A025690 0,0,1,0,1,2,0,1,2,3,0,1,2,3,4,0,1,2,3,4,5,0,1,2,3,4,5,6,0,1,2,3,4,5, %T A025690 6,7,0,1,2,3,4,5,6,7,8,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,10,1, %U A025690 2,3,4,5,6,7,8,9,0,10,1,11,2,3,4,5,6,7,8,9,0,10,1,11,2,12,3,4,5,6,7,8,9,0,10,1 %N A025690 Exponent of 10 (value of j) in n-th number of form 8^i*10^j. %Y A025690 Cf. A025634. %K A025690 nonn %O A025690 1,6 %A A025690 _David W. Wilson_